Recherche avancée

Sur d’autres sites (6375)

• Anomalie #4704 (En cours) : Par sinum tri le nombre par ordre alpha

  25 mars 2021, par Maïeul Rouquette

  Soit un site avec deux articles.

  - 20. Doublon
  - 3. Article 3

  Soit le squelette suivant

  <span class="CodeRay">par sinum titre
  
  <span class="tag">span><span class="error">(</span><span class="attribute-name">ARTICLES</span><span class="error">)</span> <span class="error">{</span><span class="attribute-name">par</span> <span class="attribute-name">sinum</span> <span class="attribute-name">titre</span><span class="error">,</span> <span class="attribute-name">titre</span><span class="error">}</span><span class="tag">></span>
  
  <span class="tag"></span>#TITRE*<span class="tag"></span>
  
  <span class="tag"></span>
  
  
  
  Par num titre
  
  <span class="tag">span><span class="error">(</span><span class="attribute-name">ARTICLES</span><span class="error">)</span> <span class="error">{</span><span class="attribute-name">par</span> <span class="attribute-name">num</span> <span class="attribute-name">titre</span><span class="error">}</span><span class="tag">></span>
  
  <span class="tag"></span>#TITRE*<span class="tag"></span>
  
  <span class="tag"></span>
  
  
  
  </span></span></span>

  Le resultat est le suivant

  par sinum titre
  20. Doublon
  3. Article 3
  Par num titre
  3. Article 3
  20. Doublon

  Visiblement, contrairement à par num, par sinum ne tient pas compte du fait que 20 > 3.

• What determine number of cpu core usage of filter select=gt(scene,0.1) ?

  15 décembre 2022, par kocoten1992

  I've notice that when using filter gt(scene,0.1), for example :

  


  ffmpeg -i big_buck_bunny.mkv -filter:v "select='gt(scene,0.1)',showinfo" -f null -

  


  Depends on the video, number of cpu cores usage varies extremely (sometimes it 3 cores usage - other time 12 cores usage in different video).

  


  Would like to ask what determine that logic ?

  


  I try to read ffmpeg source code but not familiar with it, a general explanation would be enough, but much appreciate if you point out the line/directory determine that logic in https://github.com/FFmpeg/FFmpeg.

  


  (Also not asking how to reduce cpu usage, interested in the logic determine that).

  


• FFMPEG scene detection : overlay original frame number

  21 décembre 2020, par Fugi

  I'm able to extract all frames that are not similar to the previous frame from a video file using ffmpeg -i video.mp4 -vf "select=gt(scene\,0.003),setpts=N/(30*TB)" frame%d.jpg (source)

  


  I would like to overlay the frame number onto each selected frame. I tried adding drawtext=fontfile=/Windows/Fonts/Arial.ttf: text='frame\: %{frame_num}': x=(w-tw)/2: y=h-(2*lh): fontcolor=white: box=1: boxcolor=0x00000000@1: fontsize=30 to the filter after select and setpts, however %frame_num returns 1, 2, 3, ... (source)

  


  If I put drawtext before select and setpts, I get something like 16, 42, 181, ... as frame numbers (which is exactly what I want), but since the scene detection runs after adding the text overlay, changes in the overlay may be detected as well.

  


  Is it possible to do the scene detection and overlay independently from another ? [in] split [out0][out1] can be used to apply filters separately, but I don't know how to "combine" the results again.